D defs.my
Entry 1 sense Webster, 1913

Obelus

/(ŏb"ĕ*lŭs)/ · Ob·e·lus · IPA /ˈɑbələs/
01 n. A mark [thus −, or ÷]; -- so called as resembling a needle. In old MSS. or editions of the classics, it marks suspected passages or readings.
pl. Obeli ((ŏb"ĕ*lī))
  1. 1.
    A mark [thus −, or ÷]; -- so called as resembling a needle. In old MSS. or editions of the classics, it marks suspected passages or readings.(Print.)